Lethal assassin Kai is sent to the isolated Blackwater Prison to kill Mafia Prince Enzo. After twelve assassins fail, Kai chooses a different weapon: seduction. He climbs into Enzo's bed, playing the submissive pet to survive while secretly plotting to use the mafia boss to destroy his own syndicate.
But when Enzo brings Kai back to his New York estate, the dangerous game flips. Enzo has known Kai’s true identity from day one—and has been waiting 14 years to lock him in a gilded cage. Now, surrounded by Enzo's ruthless father and a jealous rich fiancé who want him dead, Kai must make a choice. Will the deadly assassin finally slit the King's throat to win his freedom, or willingly surrender to the monster who claims his soul?
